x2-6x-7=0
Δ=36-4*1*(-7)= 36+28=64
pierwiastek z Δ= 8
x1= (6-8)/2= -1
x2= (6+8)/2= 7
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x2-6x-7=0
Δ=36-4*1*(-7)= 36+28=64
pierwiastek z Δ= 8
x1= (6-8)/2= -1
x2= (6+8)/2= 7